175 research outputs found
Blind Analysis of Food-Related IgG Identifies Five Possible Nutritional Clusters for the Italian Population : Future Implications for Pregnancy and Lactation
No full textBACKGROUND: The influence of diet in pregnant women on the immune tolerance process is intricate. Food-specific immunoglobulin G (IgG) was associated with exposure to particular food antigens. The IgG antibodies can cross the placental barrier and enter into the colostrum, and maternal IgG is amply present in breast milk. This justifies studying the immunological connection between food-specific IgG antibodies and the mother-fetus relationship. This study was designed to analyze food-specific IgG concentrations and possible food-specific IgG concentration clusters in a large cohort of subjects with a common food culture. METHODS: Food-specific IgG antibody concentrations were detected in 18,012 Caucasian or Southern European subjects over 18 years of age. We used an unsupervised hierarchical clustering algorithm to explore varying degrees of similarity among food-specific IgG antibodies. RESULTS: We identified five food groups by the evaluation of food-specific IgG values: one includes foods with a high nickel content, the second cluster is associated with gluten, the third cluster includes dairy products, the fourth one is connected to fermented foods, and the last group is correlated with cooked oils. DISCUSSION: The knowledge derived from studying a large sample allows us to determine food-specific IgG values from a single pregnant woman, compare it to an epidemic standard, and establish modifications required in her lifestyle to modulate her nutritional habits
An overview on antioxidant supplements : the current situation from a scientific point of view
No full textRecent evidence does not support a causational relationship between antioxidant supplements and reduced risk of coronary heart disease and other age-related pathologies. Advances in the understanding of the complex interactions between reactive oxygen species (ROS) and antioxidants “in vivo” and of the role of mitochondria in the adaptive response to oxidative stress suggest that physiological production of ROS in mitochondria is one of the most essential contributions to the maintenance of health and longevity. Through mechanisms linked to the concept of mitochondrial hormesis, a moderate transient increase in ROS formation increases the body's antioxidant defences by activating enzymes sensitive to oxidative stress and redox-sensitive transcription factors, while high doses of antioxidants may inhibit this adaptive response
Procedimento per il controllo della qualità di processi di saldatura laser (Procedure for laser welding process quality control)
No full textProcedimento per il controllo della qualità di processi di saldatura lase
FAPES: an expert system for designing and optimising fault-tolerant arithmetic array processors
No full textAn optimization approach to the planning of Earth observing satellites
No full textWe describe a complex optimization problem related to the observation of
the Earth surface through a constellation of agile satellites of the most recent generation equipped with Synthetic Aperture Radar instruments. We consider a model more detailed than those presented so far in the literature and we present some algorithms we have tested
On the propagation of faults and their detection in a hardware implementation of the advanced encryption standard
No full textHigh reliability is a desirable property of any implementation of the Advanced Encryption Standard (AES). To achieve high reliability, all possible faults must be detected to avoid the use and transmission of erroneous encrypted/decrypted data. In this paper we first study the behavior of faults which may occur during the encryption and decryption procedures of AES, and the way such faults eventually propagate to the final result. We then describe an appropriate detection technique for these faults. This work extends our preliminary results (G. Bertoni et al, MPCS 2002) by considering more general fault models (e.g., permanent and multiple transient faults), and the possibility of fault masking
A composite system design methodology for instrumentation and embedded system
No full textSurely, the main goal when designing an embedded system is performance maximization. Nevertheless, physical constraints such as silicon area andor power consumption take and active part in the system design by limiting, most of time, the solution space and hence
reducing the system performance.
In this paper we present a methodology for selecting the best composite model for an embedded system in a
constrained environment. The envisaged constraints are computational complexity and latency which respectively address the computational complexity issue in SW and HW realizations, respectively. It is assumed that the algorithm to be implemented in the embedded system is
not given and must be constructed by relying on some (input, output) examples. Models considered for the
system identiJication phase can be linear (e.g., ARUAX), non linear (e.g., neural based models)or composite (a
suitable mix of linear and non linear models). The best solution is then selected from the candidate ones to
optimally satisfy the application requirements
On test data compaction using linear cycle registers
No full textCompact testing (testing where data compression is employed to reduce a size of test response sequences and reference data) is widely used in the modern automated test instrumentation systems aimed at digital and mixed-signal devices. Cycle shift registers are among the most effective data compactors. They provide low hardware overhead, high operation speed and good fault coverage. The aim of this paper is to investigate single-input and multiple-input cycle registers and to derive the most general and non-recurrent analytical description of their operation. The description is then deployed for test reference data calculation. And it can also be used as a tool for error diagnosis. Another goal of the paper is to develop and research an alternative equivalent architecture for a multiple-channel cycle register allowing to produce detail error coverage analysis of this data compactor for an arbitrary bit-error multiplicity and the error configuration
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